MESON Chess Problem Database
Problem Display
PID: 578 (B1K5/b4p1Q/1p4qB/2PR3P/r3k2N/r2n3N/p4P1n/3R4 w - - 0 1)
ten Cate, Pieter
The Observer, 1965
#2
11 + 10
SOLUTION
- SOUND
- Sets
- 1...Qf5+
- 2.Qxf5#
- 1...Sf1
- 2.f3#
- 1...Sg4
- 2.f3#
- 1...Sc1
- 2.Rg5#
- 1...Se1
- 2.Rg5#
- 1...Sb2
- 2.Rg5#
- 1...Sxf2
- 2.Sxf2#
- 1...Sb4
- 2.R1d4#
- 1...Sf4
- 2.Sg5#
- 1...Sxc5
- 2.Rxc5#
- 1...Se5
- 2.R5d4#
- 1...Qf5+
- Tries
- 1.Bf4?
- threat
- 2.R5xd3#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qf5+
- 2.Rd7#
- 2.Qxf5#
- 1...Sxf2
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sxf4
- 2.Sg5#
- 1...Sxc5
- 2.R5d4#
- 2.Rxc5#
- 2.Re5#
- 1...f5
- 2.Rd6#
- 1...Rd4
- 2.Re5#
- 1...Sc1
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Se1
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sb2
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sb4
- 2.R1d4#
- 2.R5d4#
- 2.Re5#
- 1...Se5
- 2.R5d4#
- 2.Rxe5#
- 1...Bb8!
- threat
- 1.Bg7?
- threat
- 2.R5xd3#
- 2.Rd4#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qf5+
- 2.Rxf5#
- 2.Rd7#
- 2.Qxf5#
- 1...Sxf2
- 2.R5d3#
- 2.Re5#
- 1...Sxc5
- 2.R5d4#
- 2.Rxc5#
- 2.Re5#
- 1...f5
- 2.Rd4#
- 2.Rd6#
- 1...Rd4
- 2.Rxd4#
- 2.Re5#
- 1...Bb8
- 2.Rd4#
- 1...Sc1
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Se1
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sb2
- 2.R5d2#
- 2.R5d3#
- 2.R5d4#
- 2.Re5#
- 2.Rg5#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Sb4
- 2.R1d4#
- 2.R5d4#
- 2.Re5#
- 1...Sf4
- 2.Sg5#
- 2.R5d4#
- 2.Re5#
- 1...Se5
- 2.R5d4#
- 2.Rxe5#
- 1...f6!
- threat
- 1.Qxg6+?
- 1...f5
- 2.Qxf5#
- 1...fxg6!
- 1...f5
- 1.Bf4?
- Keys
- 1.Rd2!
- threat
- 2.Re2#
- 1...Qf5+
- 2.Qxf5#
- 1...Sxf2
- 2.Sxf2#
- 1...Sxc5
- 2.Rxc5#
- 1...Sf1
- 2.f3#
- 1...Sg4
- 2.f3#
- 1...Sc1
- 2.Rg5#
- 1...Se1
- 2.Rg5#
- 1...Sb2
- 2.Rg5#
- 1...Sb4
- 2.R2d4#
- 1...Sf4
- 2.Sg5#
- 1...Se5
- 2.R5d4#
- threat
- 1.Rd2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- Q(h);CHECK,OGATE::QAB1(I),XQ(h)
- S(b);N_GUARD::P(B)
- S(d);::B(J)+R(F)
- S(d);XP(B)::S(C),XS(d)
- S(d);OGATE::R1(A)
- S(d);SBLOCK::S(C)
- S(d);OGATE,XP(E)::B(J)+R(F),XS(d)
- S(d);SBLOCK::B(J)+R(F),DCHECK
- Tries
- Try
- B(H);
- Threat
- DUALS(4)
- Vars
- S(d);SBLOCK,XB(H)::S(C)
- P(j);N_SPINQ(h)::B(J)+R(F)
- R(e);SBLOCK::B(J)+R(F),DCHECK
- Refutation
- B(i);
- Try
- B(H);
- Threat
- DUALS(6)
- Vars
- B(i);::B(J)+R(F),DCHECK
- Refutation
- P(j);
- Try
- Q(I);CHECK,XQ(h)
- Vars
- P(j);P_SPINP(j)::QAB1(I),XP(j)
- Refutation
- P(j);XQ(I)
- Try
- Actual
- R(A);
- Threat
- R(A)
- Vars
- Q(h);CHECK,OGATE::QAB1(I),XQ(h)
- S(d);XP(B)::S(C),XS(d)
- S(d);OGATE,XP(E)::B(J)+R(F),XS(d)
- S(b);N_GUARD::P(B)
- S(d);::B(J)+R(F)
- S(d);OGATE::R1(A)
- S(d);SBLOCK::S(C)
- S(d);SBLOCK::B(J)+R(F),DCHECK
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).